package com.wolf.util;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.LineNumberReader;

/**
 * @author sdyang
 * @date 2019/12/20 16:44
 **/
public class MacUtil {

    public static String getOsName() {
        String os = "";
        os = System.getProperty("os.name");
        return os;
    }

    public static String getMACAddress() {
        String address = "";
        String os = getOsName();
        if (os.startsWith("Windows")) {
            try {
                String command = "cmd.exe /c ipconfig /all";
                Process p = Runtime.getRuntime().exec(command);
                BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream(), "GBK"));
                String line;
                while ((line = br.readLine()) != null) {
                    String str = new String("物理地址");
                    if (line.indexOf(str) > 0) {
                        int index = line.indexOf(":");
                        index += 2;
                        address = line.substring(index);
                        break;
                    }
                }
                br.close();
                return address.trim();
            } catch (IOException e) {
            }
        } else if (os.startsWith("Linux")) {
            String command = "/bin/sh -c ifconfig -a";
            Process p;
            try {
                p = Runtime.getRuntime().exec(command);
                BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
                String line;
                while ((line = br.readLine()) != null) {
                    if (line.indexOf("HWaddr") > 0) {
                        int index = line.indexOf("HWaddr") + "HWaddr".length();
                        address = line.substring(index);
                        break;
                    }
                }
                br.close();
            } catch (IOException e) {
            }
        }
        address = address.trim();
        return address;
    }


    public static String getMACAddress(String ipAddress) {
        String str = "", strMAC = "", macAddress = "";
        try {
            Process pp = Runtime.getRuntime().exec("nbtstat -a " + ipAddress);
            InputStreamReader ir = new InputStreamReader(pp.getInputStream());
            LineNumberReader input = new LineNumberReader(ir);
            for (int i = 1; i < 100; i++) {
                str = input.readLine();
                if (str != null) {
                    if (str.indexOf("MAC 地址") > 1) {
                        strMAC = str.substring(str.indexOf("MAC Address") + 14,
                                str.length());
                        break;
                    }
                }
            }
        } catch (IOException ex) {
            return "Can't Get MAC Address!";
        }
        if (strMAC.length() < 17) {
            return "Error!";
        }

        macAddress = strMAC.substring(0, 2) + ":" + strMAC.substring(3, 5)
                + ":" + strMAC.substring(6, 8) + ":" + strMAC.substring(9, 11)
                + ":" + strMAC.substring(12, 14) + ":"
                + strMAC.substring(15, 17);
        return macAddress;
    }

    public static void main(String[] args) {
        System.out.println(getMACAddress());
    }

}
